Details for Benchmark: DX3525
N 33° 08.350 W 116° 22.367 (NAD 83)
Coordinates may not be exact. Altitude is READJUSTED and location is SCALED. (more info)
- In SAN DIEGO county, CA View Original Datasheet
- T 1310
- Marker Type:
- bench mark disk
- in a boulder
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1978 by NGS (MONUMENTED)
|DESCRIBED BY NATIONAL GEODETIC SURVEY 1978
9.55 MI SW FROM BORREGO SPRINGS. 2.4 MILES SOUTH ALONG BORREGO VALLEY ROAD FROM THE BORREGO ELEMENTARY SCHOOL, THENCE 1.1 MILES EAST ALONG RANGO WAY, THENCE 0.55 MILE SOUTH ALONG YAQUI PASS ROAD, THENCE 5.5 MILES SOUTHWEST ALONG COUNTY ROAD S3, 1.35 MILES SOUTHWEST OF THE SUMMIT OF YAQUI PASS, 19.25 MILES EAST FROM THE POST OFFICE AT JULIAN, 0.15 MILE NORTHEAST OF THE MAIN ENTRANCE TO TAMARISK GROVE CAMPGROUND, AT A SANDY WASH, OPPOSITE MILE POST 0.5, IN TOP OF A 6.5 BY 5-FT. BOULDER, 2 FT. ABOVE GROUND, 37.9 FT. NORTHWEST OF THE CENTER LINE OF THE ROAD, 56.6 FT. NORTHWEST OF AN ACROSS THE ROAD FROM THE MILE POST, 81.0 FT. NORTHEAST OF THE CENTER LINE OF THE WASH.
- The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
- The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in February 1993. * This is a READJUSTED BENCH MARK height. Code A indicates a distribution rate of 0.0 thru 1.0 mm/km. The height was derived from older observations constrained to new heights in a crustal motion area. The height is approximate in relation to other heights in its vicinity.
- The geoid height was determined by GEOID99.
- The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
- The modeled gravity was interpolated from observed gravity values.